US6362108B1 - Composition for mechanical chemical polishing of layers in an insulating material based on a polymer with a low dielectric constant - Google Patents

Composition for mechanical chemical polishing of layers in an insulating material based on a polymer with a low dielectric constant Download PDF

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Publication number
US6362108B1
US6362108B1 US09/553,037 US55303700A US6362108B1 US 6362108 B1 US6362108 B1 US 6362108B1 US 55303700 A US55303700 A US 55303700A US 6362108 B1 US6362108 B1 US 6362108B1
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US
United States
Prior art keywords
composition
colloidal silica
chemical polishing
mechanical chemical
insulating material
Prior art date
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Expired - Lifetime
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US09/553,037
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English (en)
Inventor
Eric Jacquinot
Pascal Letourneau
Maurice Rivoire
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Merck Patent GmbH
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Clariant France SA
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Assigned to CLARIANT (FRANCE) S.A. reassignment CLARIANT (FRANCE) S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JACQUINOT, ERIC, LETOURNEAU, PASCAL, RIVOIRE, MAURICE
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Assigned to AZ ELECTRONIC MATERIALS USA CORP. reassignment AZ ELECTRONIC MATERIALS USA CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLARIANT INTERNATIONAL LTD
Assigned to CLARIANT INTERNATIONAL LTD reassignment CLARIANT INTERNATIONAL LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLARIANT (FRANCE)
Assigned to MERCK PATENT GMBH reassignment MERCK PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AZ ELECTRONIC MATERIALS USA CORP.
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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09GPOLISHING COMPOSITIONS; SKI WAXES
    • C09G1/00Polishing compositions
    • C09G1/02Polishing compositions containing abrasives or grinding agents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/14Anti-slip materials; Abrasives
    • C09K3/1454Abrasive powders, suspensions and pastes for polishing
    • C09K3/1463Aqueous liquid suspensions
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00Etching metallic material by chemical means
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/16Acidic compositions
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/64Nanometer sized, i.e. from 1-100 nanometer
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/302Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
    • H01L21/306Chemical or electrical treatment, e.g. electrolytic etching
    • H01L21/30625With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/31Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
    • H01L21/3205Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
    • H01L21/321After treatment
    • H01L21/32115Planarisation
    • H01L21/3212Planarisation by chemical mechanical polishing [CMP]

Definitions

  • the present invention relates to a composition for mechanical chemical polishing of a layer in an insulating material based on a polymer with a low dielectric constant.
  • each metallic interconnecting level must be electrically insulated. To this end, each level is encapsulated in a dielectric layer.
  • the interconnecting metallic tracks of integrated circuits are most often made by metal reactive ionic etching according the following sequence: an aluminium or aluminium alloy film approximately 10 ⁇ 12 m thick is deposited by means of a beam of electrons or beam of ions (sputtering); the design of the interconnecting circuit is then transferred there by photolithography then by reactive ionic etching (RIE).
  • RIE reactive ionic etching
  • the tracks thus defined are then covered with a dielectric layer, usually based on silicon oxide, most often obtained by decomposition in the vapour phase of tetraethylorthosilicate (TEOS). This layer is then planarized by mechanical chemical polishing.
  • fluorinated poly(arylethers) such as Flare®
  • poly(arylethers) such as PAE-2,
  • poly(p-xylylene) such as Parylene® N and poly( ⁇ , ⁇ , ⁇ ′, ⁇ ′-tetrafluoro-p-xylylene) such as Parylene® F,
  • aromatic hydrocarbons such as SiLK®.
  • these polymers with a low dielectric constant must in the main satisfy the following criteria:
  • the polymer layer deposited must then be able to be planarized by mechanical chemical polishing.
  • a subject of the present Application is therefore a composition for mechanical chemical polishing of a layer in an insulating material based on a polymer with a low dielectric constant, characterized in that said polishing composition comprises an acid aqueous suspension of cationized colloidal silica containing individualized colloidal silica particles, not linked to each other by siloxane bonds and water as the suspension medium.
  • acid aqueous suspension of cationized colloidal silica is meant an acid aqueous suspension of colloidal silica surface modified by tri- or tetravalent metal oxides such as aluminium, chromium, gallium, titanium or zirconium and which are in particular described in the book “The Chemistry of Silica—R. K. Iler-Wiley Interscience (1979)” p. 410-411.
  • the acid aqueous suspension of cationized colloidal silica containing colloidal silica particles, not linked to each other by siloxane bonds is obtained from a solution of aluminium hydroxychloride at approximately 50% by weight in which an alkaline silica sol stabilized with sodium and at a pH of about 9 is introduced under agitation.
  • an alkaline silica sol stabilized with sodium and at a pH of about 9 is introduced under agitation.
  • insulating material based on a polymer with a low dielectric constant of SiLK® type is meant a material as described by PH. Towsend et al in Mat. Res. Soc. Symp. Proc. 1997, 476, p. 9-17. This material is constituted by an oligomeric solution with a viscosity of 30 centipoises the polymerization of which does not require a catalyst and does not lead to the formation of water.
  • the polymerized network is an aromatic hydrocarbon which does not contain fluorine. Its dielectric constant is 2.65, its glass transition temperature is greater than 490° C. and its refractive index is 1.63.
  • the aforementioned aqueous suspension of colloidal silica is cationized by tri- or tetravalent metal oxides such as aluminium, chromium, gallium, titanium or zirconium and quite particularly aluminium.
  • the above composition for mechanical chemical polishing will have a pH comprised between 1 and 6, preferably between 2 and 4.
  • the above polishing composition contains cationized colloidal silica particles, not linked to each other by siloxane bonds, with a diameter comprised between 3 and 250 nanometers, preferably between 10 and 50 nanometers.
  • a subject of the present invention is also a process for mechanical chemical polishing of a layer of insulating material based on a polymer with a low dielectric constant in which abrasion of said layer of insulating material is carried out by rubbing said layer using a fabric containing an abrasive, characterized in that the abrasive contains an acid aqueous suspension of cationized colloidal silica containing individualized colloidal silica particles, not linked to each other by siloxane bonds, and water as the suspension medium.
  • a subject of the present invention is also an abrasive which is useful in particular for mechanical chemical polishing of a layer of insulating material based on a polymer with a low dielectric constant, comprising a fabric impregnated with an acid aqueous suspension of cationized colloidal silica containing individualized colloidal silica particles, not linked to each other by siloxane bonds, with a diameter comprised between 3 and 250 nanometers, with a pH comprised between 1 and 6, and water as the suspension medium.
  • the abrasive composition 1 is constituted by an acid aqueous suspension of colloidal silica, containing colloidal silica particles not linked to each other by siloxane bonds, and cationized by aluminium hydroxychloride described previously which has the following characteristics:
  • pH of the aqueous suspension 3.5
  • An abrasive composition 1 according to the invention is obtained.
  • a deposit of SiLK® of 10000 ⁇ thickness is carried out by centrifugation on 200 mm diameter slices of silicon. Then the layer is polymerized during a post-curing at 450° C.
  • the slices are then polished on a PRESI 2000 polisher under the following polishing conditions:
  • the polishing speed and the non-uniformity are determined by measuring the thickness of SiLK® using an ellipsometer before and after polishing, at 17 points of the slice.
  • This abrasive composition 1 allows the following results to be obtained:
  • the abrasive composition 2 is similar to abrasive composition 1, but at a concentration by weight of colloidal silica of 15%.
  • An abrasive composition 2 according to the invention is obtained.
  • this abrasive composition 2 allows the following results to be obtained:
  • the abrasive composition 3 is constituted by an acid aqueous suspension of colloidal silica, containing colloidal silica particles not linked to each other by siloxane bonds, and cationized by aluminium hydroxychloride described previously which has the following characteristics:
  • pH of the aqueous suspension 3.5
  • An abrasive composition 3 according to the invention is obtained.
  • this abrasive composition 3 allows the following results to be obtained:
  • the abrasive composition is constituted by an acid aqueous suspension of colloidal silica, containing colloidal silica particles not linked to each other by siloxane bonds, the characteristics of which are the following:
  • this abrasive composition produced the following result:
  • This low speed forbids the use of this composition for the polishing of layers based on a polymer with a low dielectric constant.
  • the abrasive composition is constituted by a basic aqueous suspension of colloidal silica containing colloidal silica particles not linked to each other by siloxane bonds, the characteristics of which are the following:
  • this abrasive composition produced the following result.
  • This low speed forbids the use of this composition for the polishing of layers based on a polymer with a low dielectric constant.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Element Separation (AREA)
US09/553,037 1999-04-22 2000-04-20 Composition for mechanical chemical polishing of layers in an insulating material based on a polymer with a low dielectric constant Expired - Lifetime US6362108B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9905123A FR2792643B1 (fr) 1999-04-22 1999-04-22 Composition de polissage mecano-chimique de couches en un materiau isolant a base de polymere a faible constante dielectrique
FR99-05123 1999-04-22

Publications (1)

Publication Number Publication Date
US6362108B1 true US6362108B1 (en) 2002-03-26

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US09/553,037 Expired - Lifetime US6362108B1 (en) 1999-04-22 2000-04-20 Composition for mechanical chemical polishing of layers in an insulating material based on a polymer with a low dielectric constant

Country Status (17)

Country Link
US (1) US6362108B1 (de)
EP (1) EP1046690B1 (de)
JP (1) JP3967522B2 (de)
KR (1) KR100607919B1 (de)
CN (1) CN1153823C (de)
AT (1) ATE272100T1 (de)
CZ (1) CZ300220B6 (de)
DE (1) DE60012399T2 (de)
DK (1) DK1046690T3 (de)
ES (1) ES2223441T3 (de)
FR (1) FR2792643B1 (de)
HU (1) HU228376B1 (de)
ID (1) ID25822A (de)
MY (1) MY124983A (de)
PT (1) PT1046690E (de)
SG (1) SG83204A1 (de)
TW (1) TW491886B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030157034A1 (en) * 2000-05-11 2003-08-21 Weitao Jia Dental acid etchant composition and method of use
US20030157804A1 (en) * 2001-12-27 2003-08-21 Lothar Puppe Composition for the chemical mechanical polishing of metal and metal/dielectric structures
US20050026205A1 (en) * 2001-10-26 2005-02-03 Lothar Puppe Method of polishing metal and metal/dielectric structures
TWI393771B (zh) * 2006-07-21 2013-04-21 Cabot Microelectronics Corp 加強氧化物移除速率之鎵與鉻離子

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3899456B2 (ja) 2001-10-19 2007-03-28 株式会社フジミインコーポレーテッド 研磨用組成物およびそれを用いた研磨方法
FR2831179B1 (fr) 2001-10-22 2005-04-15 Rhodia Chimie Sa Procede de preparation en milieu aqueux de compositions pigmentaires a base de silice
CN1705725A (zh) * 2002-10-22 2005-12-07 皮斯洛奎斯特公司 化学机械抛光铜表面用的腐蚀延迟抛光浆液
JP2005268667A (ja) * 2004-03-19 2005-09-29 Fujimi Inc 研磨用組成物
US7052373B1 (en) * 2005-01-19 2006-05-30 Anji Microelectronics Co., Ltd. Systems and slurries for chemical mechanical polishing
CN101077961B (zh) * 2006-05-26 2011-11-09 安集微电子(上海)有限公司 用于精细表面平整处理的抛光液及其使用方法
JP6878772B2 (ja) * 2016-04-14 2021-06-02 昭和電工マテリアルズ株式会社 研磨剤、研磨剤用貯蔵液及び研磨方法

Citations (6)

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US5382272A (en) 1993-09-03 1995-01-17 Rodel, Inc. Activated polishing compositions
EP0773270A2 (de) 1995-11-10 1997-05-14 Tokuyama Corporation Poliersuspensionen und Verfahren zu ihrer Herstellung
US5885334A (en) * 1996-05-15 1999-03-23 Kabushiki Kaisha Kobe Seiko Sho Polishing fluid composition and polishing method
US6043159A (en) 1996-10-23 2000-03-28 Clariant Chimie S.A. Chemical mechanical polishing process for layers of isolating materials based on silicon derivatives or silicon
US6046111A (en) * 1998-09-02 2000-04-04 Micron Technology, Inc. Method and apparatus for endpointing mechanical and chemical-mechanical planarization of microelectronic substrates
EP1000995A1 (de) 1998-11-09 2000-05-17 Clariant (France) S.A. Schleifmittelzusammensetzung zur Verwendung in der Elektronikindustrie

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JP2677646B2 (ja) * 1988-12-26 1997-11-17 旭電化工業株式会社 コロイダルシリカの製造方法
FR2761629B1 (fr) * 1997-04-07 1999-06-18 Hoechst France Nouveau procede de polissage mecano-chimique de couches de materiaux semi-conducteurs a base de polysilicium ou d'oxyde de silicium dope

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Publication number Priority date Publication date Assignee Title
US5382272A (en) 1993-09-03 1995-01-17 Rodel, Inc. Activated polishing compositions
EP0773270A2 (de) 1995-11-10 1997-05-14 Tokuyama Corporation Poliersuspensionen und Verfahren zu ihrer Herstellung
US5885334A (en) * 1996-05-15 1999-03-23 Kabushiki Kaisha Kobe Seiko Sho Polishing fluid composition and polishing method
US6043159A (en) 1996-10-23 2000-03-28 Clariant Chimie S.A. Chemical mechanical polishing process for layers of isolating materials based on silicon derivatives or silicon
US6046111A (en) * 1998-09-02 2000-04-04 Micron Technology, Inc. Method and apparatus for endpointing mechanical and chemical-mechanical planarization of microelectronic substrates
EP1000995A1 (de) 1998-11-09 2000-05-17 Clariant (France) S.A. Schleifmittelzusammensetzung zur Verwendung in der Elektronikindustrie

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Abstract for JP Patent No. 2172812 XP-002127019.
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P. H. Townsend, S. J. Martin, J. Godschalx, D. R. Romer, D. W. Smith, Jr., D. Castillo, R. DeVries, G. Buske, N. Rondan, S. Froelicher, J. Marshall, E. Q. Shaffer, J-H. Im, Materials Research Society Symposium Proceedings, 1997, vol. 476, pp. 9-17.
R. K. Iler, The Chemistry of Silica, A. Wiley-Interscience Publication (1979) pp. 410-411.
Y. L. Wang, C. Liu, S-T. Chang, M.-S. Tsai, M-S. Feng, W.-T Tseng, Thin Solid Films (1997) 308-309, pp. 550-554.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030157034A1 (en) * 2000-05-11 2003-08-21 Weitao Jia Dental acid etchant composition and method of use
US6753001B2 (en) * 2000-05-11 2004-06-22 Pentron Clinical Technologies, Llc Dental acid etchant composition
US20050026205A1 (en) * 2001-10-26 2005-02-03 Lothar Puppe Method of polishing metal and metal/dielectric structures
US20030157804A1 (en) * 2001-12-27 2003-08-21 Lothar Puppe Composition for the chemical mechanical polishing of metal and metal/dielectric structures
TWI393771B (zh) * 2006-07-21 2013-04-21 Cabot Microelectronics Corp 加強氧化物移除速率之鎵與鉻離子

Also Published As

Publication number Publication date
MY124983A (en) 2006-07-31
EP1046690B1 (de) 2004-07-28
FR2792643B1 (fr) 2001-07-27
TW491886B (en) 2002-06-21
ES2223441T3 (es) 2005-03-01
KR20000071761A (ko) 2000-11-25
ATE272100T1 (de) 2004-08-15
KR100607919B1 (ko) 2006-08-04
HUP0001483A2 (en) 2001-03-28
HUP0001483A3 (en) 2003-02-28
SG83204A1 (en) 2001-09-18
ID25822A (id) 2000-11-09
DK1046690T3 (da) 2004-09-27
JP2000351957A (ja) 2000-12-19
DE60012399D1 (de) 2004-09-02
HU228376B1 (en) 2013-03-28
DE60012399T2 (de) 2004-12-23
FR2792643A1 (fr) 2000-10-27
CZ300220B6 (cs) 2009-03-18
CZ20001494A3 (cs) 2001-04-11
EP1046690A1 (de) 2000-10-25
CN1153823C (zh) 2004-06-16
HU0001483D0 (en) 2000-06-28
PT1046690E (pt) 2004-10-29
JP3967522B2 (ja) 2007-08-29
CN1272519A (zh) 2000-11-08

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